Scaffold



W. VN DEEST. SCAFFGLD. APPLlcAHoN mw sEPT. 19, 191g.

L Patented Feb, 15, 1921.

Mam @22296554 UNITED STATES PATENT QiililCE.

WILLIAM VON BREST, OF ASHTON, IGWA.

SGAFFOLD.

Application led September 19, 1919.

Y To all whom t may concern.'

Be it known that l, VILLIAM Voir Dnns'r, a citizen of the United States, residingat Ashton, in the county of sceola, State of Iowa, have invented a new and useful Seat fold; and l do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

lEhe invention relates to scafolds and has :for its object to provide a scaiiold particularly adapted for mechanics working on a building wall or the like wherein it is necessary to lower or raise the scaffold from time to time. Also to provide a scatfold oitl this character which is suspended from roof of a building by blocks and tackles which are secured to roof hooks or the like and to the ends of the scaliold, the lines from the blocks and tackles leading over pulleys on the scaffold to a rotatable drum, thereby providing means for the operator to adjust the scaffold as a whole upwardly or downwardly as desired without going to each end of the scaitold to operate the blocks and tackle.

A further object is to provide a wheeled seat on runways of the scaliold thereby allowing the painter or other mechanic to move the seat longitudinally on the scaffolding without getting out of the seat.

With the above and other objects in view the invention resides in the combination and arrangement of parts as hereinafter set forth, sho-wn in the drawings, described and claimed, it being understood that changes in the precise embodiment ot the invention may be made within the scope oi what is claimed without departing from the spirit of the invention.

In the drawings Figure 1 is a View in elevation showing th; scaifold suspended from a root or the li e.

Fig. 2 is a vertical sectional view taken on line 2-2 of Fig. 1.

Fig. 3 is a perspective detail view of a portion of the main board of the scaffold and the adjacent track.

Referring to the drawings, the numeral 1 designates the cornice of a root' and 2 the scaold suspended against the wall of the building. The scali'old 2 comprises an elongated board 3, the ends of. which are pro- Specification of Letters Patent.

Serial No. 324,813.

vided with upwardly extending brackets i, which brackets receive the lower block 5 of blocks and falls 6; the upper blocks .7 oi the blocks and falls 6 are hooked into eyes 8 of root hooks 9, thereby suspending the scat! fold from the cornice 1 of a roof. The leads 10 o'l' the blocks and falls pass under pulleys 11 carried by thescailold and then pass around and are secured to a vertically dis.N posed drum 12, which drum is rotatably mounted in bearings oi arms 13 carried by a longitudinally adjustable yoke 1a slidably mounted on the scali'old board 3, said yoke having one of its horizontal portions provided with a set screw 15, whereby the yoke may be securely clamped in any desired position against horizontal movement. The upper end of the shaft ot' the drum 12, is provided with a crank 16 whereby the drum may be rotated as desired to wind the lines 10 on said drum, there being a ratchet 17 and pawl 17 for holding the drum in position to which it may have been rotated. However, during a lowering operation the pawl may be thrown out of engagement with the ratchet and the unwinding oi the lines 10 from the drum 12 may be controlled by a brake member 18 around which a strap brake 19 extends and has its end secured to one oi the arms 13 as at 20, the other end of the strap brake being connected as at 21 to a lever 22 which is pivoted as at 23 to the inner end or the yoke 141. It will be seen that by operating the lever 22 the bra-ke strap 19 may be tensioned around the brake member 18, thereby controlling the rotation of the vertically disposed drum 12 as the scaold lowers under its own weight and that of the operator.

Longitudinally movable on tracks 211, carried by upstanding brackets 25 which are secured to the scaffold board 3 is a wheeled seat 26, said wheeled seat being provided with a foot rest 27 and shelves 28 for the reception of paint buckets and the like. This seat is adapted to be occupied by the operator as he works, he may easily move the seat longitudinally as desired which is a decided advantage in painting where painters work in courses that is paint a horizontal strip and then lower the scaffold for another course. All that is necessary for the operator to do when he wants to move the seat longitudinally is to grasp the rail 29 and'pull the seat to any desired position. 11o

Patented Feb. 15, 1921.

VThe roda) is Supported by the brackets so,

Which are secured to the outside track 24k as at 3l..

From the above it will be seen that a scaffold is provided which may be easily and quickly adjusted upwardly or downwardly and one whereinv a longitudinally movable seat is provided for'the operator so that he may move from plaeeto place as desired.

The invention having been set forth what is elaimed as neu7 and useful is A scaffolding comprising a horizontally disposed platform, said platform being susV pended from blocks and falls at its ends, the leads from said falls extending downwardly and under horizontally pivoted pulleyslcarried by the rear side of the platform, said leads extending toward each other and around a vertically pivoted drum,

l said drum being pivotally mounted between Y it may be moved longitudinally of the platform7 a Ybrake Carried by the drum shaft and controlled from a lever, said lever being pivotally connected to the forward end of the yoke and means for rotating the vertically disposed drum and means for holding said drum in any position to which it maybe moved. o ln testimony whereof l have signed my name to this specification in the presence of two Subscribing witnesses.

WILLIAM VON DEEST.

Witnesses:

B. M. YAPPEN, Y W. A. ROBEN. 

